Teaching Algebra with Manipulatives

Chapter
14
Trigonometric Graphs and Identities
Teaching Notes and Overview
Mini-Project
Trigonomessage
(p. 304 of this booklet)
Use With Lesson 14-7.
Objective Solve trigonometric equations.
Form groups of two or three students to solve
the equations and find the letter that goes with
each exercise number. Point out to students that
most trigonometric equations, like some
algebraic equations, are true for some but not
all values of the variable. Have them check
their solutions. Have a reward for each group
that discovers the secret message. As a class, go
over the solutions. Call on students to show and
explain their solutions. There may be students
interested in developing a similar type of Mini-
Project activity using different equations and
decoding a secret message. Students will learn a
great deal from developing such an activity.
Algebra 2—Chapter 14
Answers
1. 300; L
2. 45; S
3. 90; D
4. 120; T
5. 150; I
6. 30; M
7. 210; E
8. 0; N
9. 300; L
10. 210; E
11. 30; G
12. 240; H
message: MEETING AT SMALL SHED
© Glencoe/McGraw-Hill 303 Teaching Algebra with Manipulatives